Well thankfully Google Maps allows you to set your parking location very easily. If you have location services on, simply select the blue location "dot" and then a card will come up where you can select P for Set as parking location.
You can also share your location with others as well - especially helpful when travelling with a number of vehicles.
Below you will see an animated GIF followed by a 1 minute and 4 second YouTube tutorial I created.
As always, any questions please let me know.